Yes it can be a key security solution. But are you sure you won't forget those 2 separate words? Maybe you can also save 12 of the 24 words in a different place. I think whatever you do will be good for you as long as no one finds out about your plans.
So it's better if you do what you plan to do without sharing it here, so what you keep secret will be completely safe. But for stronger security, maybe you can consider using a multisign wallet. You can store keys in separate places and can share keys (10 of 12 words/ 20 of 24 words). Especially if you plan to hold bitcoins for a long time, multisign is the best. It can be a family asset and you can give keys to each family member to make it more secure